Taken from
this post at Digitalspy:
http://www.ntl.com/locales/gb/en/inv...-Final-UBS.pdf
http://media.corporate-ir.net/media_...UBS_061204.pdf
These are presentations by the CEOs of NTL and Telewest respectively, and confirm that both will be launching VOD and PVRs in the second half of 2005.
Page 15 of the second link even gives a picture of the Telewest PVR box, along with some specs.